A hardware viterbi decoder of punctured codes is commonly implemented in such a way:
- A depuncturer, which transforms the input stream into the stream which looks like an original (non punctured) stream with ERASE marks at the places where bits were erased.
- A basic viterbi decoder understanding these ERASE marks (that is, not using them for branch metric calculation).
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“We must trust infinitely to the beneficent necessity which shines through all laws. Human nature expresses itself in them as characteristically as in statues, or songs, or railroads, and an abstract of the codes of nations would be an abstract of the common conscience.”
—Ralph Waldo Emerson (1803–1882)